Need more code space

Im using a pic 16f628 which has 2k of memory, I need an 18 pin pic chip with the same pinouts as a pic16f628. Idealy more than 4k of code space. What are my options if any.

Thanks Sphere...

Why not look at the 16F648A? It's got the same spec sheet.

Thanks for the reply, just checked the data sheet but I could do with more than 4k. Its looking like a hardware re-design.

Thanks anyway Sphere....